spatial and temporal distribution of rainstorm frequency and extreme value of short duration (3 h,6 h,12 h) in Tonren city was analyzed. The results showed that songtao county, northeast of Fanjing Mountain, was the high occurrence area of short duration rainstorm, and the best time of rainstorm orange and above warning was mainly at night, with the proportion of 62.5% (Wanshan) ~ 100% (Sinan). The optimal time for issuing yellow rainstorm warnings or above was mainly at night, with 53.6% (Wanshan) ~ 77.3% (Sinan). Most of the time when 3h and 6h rainfall initially reached the rainstorm standard was also at night, and the proportion was 50% (Wanshan) ~ 95.2% (Yinjiang) and 58.8% (Yuping) ~ 77.1% (Songtao), respectively. Therefore, it is necessary to carry out the "three calls" of heavy precipitation. Through the case analysis, the short duration rainstorm in the county area still has the characteristics of dispersion and jump, and should be paid enough attention to when on duty and service.